This book constitutes the thoroughly refereed post-proceedings of the 4th International Andrei Ershov Memorial Conference, PSI 2001, held in Akademgorodok, Novosibirsk, Russia, in July 2001.
The 50 revised papers presented together with 2 invited memorial papers devoted to the work of Andrei Ershov were carefully selected during 2 rounds of reviewing and improvement. The book offers topical sections on computing and algorithms, logical methods, verification, program transformation and synthesis, semantics and types, processes and concurrency, UML specification, Petri nets, testing,...

This text constitutes the thoroughly refereed post-proceedings of the Third International Andrei Ershov Memorial Conference, PSI'99, held in Akademgorodok, Novosibirsk, Russia, in July 1999. The 44 revised papers, presented together with five revised full invited papers, were carefully reviewed and selected from a total of 73 submissions. The papers are organized in sections on: algebraic specifications; partial evaluation and super compilation; specification with states; concurrency and parallelism; logic and processes; languages and software; database programming; object-oriented...